Mounting for rock drills



INVENTOR LEO L. RICHARDSON L. L. RICHARDSON MOUNTING FOR ROCK DRILLS Flled May 15 1939 Nov. 7, 1939.

ATTORNEY a Patented Nov. 7, 1939 UNITED STATES MOUNTING FOR ROCK DRILLS Led L. Richardson, Garfield Heights, Ohio, as-

signor to The Cleveland Rock Drill Company, Cleveland, Ohio, a corporation of Ohio Application May 15, 1939, Serial No. 273,593

4 Claims.

This invention relates broadly to mountings, but more particularly to a mounting for rock drills of the sinker type.

One object of this invention is to produce a 5 mounting through which a rock drill of the sinker or hand held type may be readily used as a drifter for drilling horizontal holes.

Another object of this invention is to produce such a mounting with novel and improved clamping means enabling a rapid disposition of the rock drill on its support.

Other objects and advantages more or less ancillary to the foregoing reside in the specific construction and aggroupment of the elements peculiar to this structure, as will become apparent from a more complete examination of this specification.

In the drawing:

Fig. l is a side elevational view of a support embodying the invention.

Fig. 2 is an enlarged cross sectional view taken in a plane indicated by line 22 in Fig. 1.

Fig. 3 is an enlarged cross sectional view taken in a plane indicated by line 33 in Fig. 1.

Fig. 4 is a view similar to Fig. 3 illustrating some of the movable parts in a different position.

Referring to the drawing, represents the usual support or shell formed with a cone II depending from its lower wall, while its two side 30 walls 12 and I3 are each provided with a guideway I l extending the full length thereof. One end of the shell includes the usual cross head l5 held in position by two side bolts I6 and H, which extend beyond the other end of the shell each to carry a tube or spacer l8 and a cross head I!) clamped in position against the tube l8 by a nut 28. Journaled within the cross heads l5 and I9, there are the ends of a feed screw 2| rotatable by a handle 22.

Slidable on the shell Ill, there is a carriage 23 formed with guides 24 slidably fitted within the guideways M, and with a boss 25 depending from its lower wall to receive a feed nut 26 through which extends the feed screw 2|. Toward the left in Fig. l, the end of the carriage 23 is provided with two laterally spaced upwardly extending ears 2! and 28 which are apertured to receive a cross bolt 29. In practice, the normally hand held rock drill, generally designated by 30, includes a back head 3| formed with apertured lugs 32 and 33 through which the bolt 29 may be passed for securing that portion of the rock drill to the carriage.

The front end of the carriage is terminated by two upwardly extending laterally spaced lugs 34, each being slotted as at 35 and longitudinally apertured as at 36 to receive a bolt or pin 31 on which is pivotally mounted a jaw 38. Since the pivotal axis of this jaw is substantially parallel to the center axis of the carriage 23 or of the 5 shell II], it will be understood that the jaws 38 are capable of pivotal movement laterally of the carriage. The upper free'ends of the jaws 38 are in the form of introverted hooks 39 capable of fitting over longitudinal bosses 40 provided on 10 the rear end portion of the rock drill front housing 4!. Below their pivotal axis 31, each clamp 38 is formed with a shank 42 extending laterally thereof toward each other and provided with a fiat bottom bore 43 constituting sockets for the 16 end portions of a relatively long compression spring 44 mounted between the two jaw members as clearly shown in Fig. 3.

In practice, after the back head 3| has been fastened to the carriage by the bolt 29, the front 20 end portion of the rock drill may be secured to the carriage by the operator simply pressing downwardly on the front housing 4!. In this instance, the bosses 40 of the front housing 4| engaging the inclined end walls 45 of the jaws 39, will effect an outward camming action on the jaws, causing them to move away from each other by compressing the spring 44 as shown in Fig. 4, and consequently enabling passage of the front housing M between the jaws. Subsequently, with the rock drill housing 46 located between the jaws as shown in Fig. 3, the compressing spring 44 active on the bottom of the bores 42 will exert enough pressure on the jaws 38 to maintain the introverted hooks 39 in clamping engagement with the bosses of the front housing 4|.

When the rock drill is secured to the carriage in the manner above described, it will be understood that the rock drill may be fed toward or away from the work by simply rotating the 40 handle 22.

When it is desired to remove the rock drill from thecarriage, the drills front end may simply be jerked upwardly, causing the jaws 38 to open or move into the position shown in Fig. 4, and consequently enabling removal of the rock drill from the jaws. Subsequently, the bolt 29 acting as a pivotal connection between the rear end of the rock drill and the carriage, through which connection pivotal movement of the rock 50 drill into and out of operative engagement with the jaws 38 is possible, may be removed and the rock drill 30 again used as a hand held rock drill.

When the rock drill is removed from the carriage, in order to prevent the introverted hook portions 39 of the clamps 38 to move inwardly much beyond the position shown in Fig. 3, the shanks 42 are made engageable with the bottom wall 48 of the carriage, thereby limiting inward swinging movement of the hooks 39 and maintaining them far enough apart to enable their outward movement upon downward pivotal movement of the rock drill front end 41 I Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. A mounting, comprising in combination with a rock drill, a support, a carriage slidable on the support, means carried by one end of the carriage enabling a detachable connection between the carriage and the rock drill, a pair of rock drill clamping jaws pivotally carried by the other end of the carriage, and spring means automatically efiecting the clamping engagement of said jaws with the rock drill immediately after insertion of the rock drill between said jaws.

2. A mounting, comprising in combination with a rock drill, a support, a carriage slidable on the support, apertured lugs on one end of the carriage adapted to receive a bolt .for establishing a detachable connection between the carriage and the rock drill, a pair of laterally spaced rock drill clamping jaws carried by the other end of the carriage for pivotal movement laterally thereof, and spring means automatically effecting the clamping engagement of said jaws with the rock drill immediately after insertion of the rock drill between said jaws.

3. A mounting, comprising in combination with a rock drill, a support, a carriage slidable on the support, a pair of rock drill clamping jaws car ried by said carriage for pivotal movement transversally thereof, and spring means active on said jaws for urging them into clamping engagement with the rock drill.

4. A mounting, comprising in combination with a rock drill, a support, a carriage slidable on the support, a pair of rock drill clamping jaws carried by said carriage for pivotal movement transversally thereof, the free upper end of each jaw forming an introverted hook engageable with the rock drill, a socket within the lower end of each jaw, and a compression spring between said jaws housed within said sockets and active on the jaws for effecting operative engagement of said hooks with the rock drill.

LED L. RICHARDSON. 

